Culligan CP5-BBS Level 4 Premium Heavy-Duty Sediment Replacement Cartridge: * Cartridge fits the HD-950A water filter * Reduces: sediment, rust, scale, dirt, coarse sand, sand, fine sand, extra fine sand and silt * 5 micron pleated polyester and cellulose cartridge * Cartridge life is up to 6 months or 24,000 gallons * Not recommended for use with non-treated well water supplies * Cartridge change reminder sticker included * Model# CP5-BBS